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1.1 root 1: #!/bin/sh -
2: copyright='
3: /*
4: * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
5: * Copyright (c) 1992, 1993, 1994, 1995
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36: '
37: SCRIPT_ID='@(#)vnode_if.sh 8.7 (Berkeley) 5/11/95'
38:
39: # Script to produce VFS front-end sugar.
40: #
41: # usage: vnode_if.sh srcfile
42: # (where srcfile is currently /sys/kern/vnode_if.src)
43: #
44:
45: if [ $# -ne 1 ] ; then
46: echo 'usage: vnode_if.sh srcfile'
47: exit 1
48: fi
49:
50: # Name of the source file.
51: src=$1
52:
53: # Names of the created files.
54: out_c=vnode_if.c
55: out_h=vnode_if.h
56:
57: # Awk program (must support nawk extensions)
58: # Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
59: #awk=${AWK:-awk}
60: awk=${AWK:-gawk}
61:
62: # Does this awk have a "toupper" function? (i.e. is it GNU awk)
63: isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
64:
65: # If this awk does not define "toupper" then define our own.
66: if [ "$isgawk" = TRUE ] ; then
67: # GNU awk provides it.
68: toupper=
69: else
70: # Provide our own toupper()
71: toupper='
72: function toupper(str) {
73: _toupper_cmd = "echo "str" |tr a-z A-Z"
74: _toupper_cmd | getline _toupper_str;
75: close(_toupper_cmd);
76: return _toupper_str;
77: }'
78: fi
79:
80: #
81: # This is the common part of all awk programs that read $src
82: # This parses the input for one function into the arrays:
83: # argdir, argtype, argname, willrele
84: # and calls "doit()" to generate output for the function.
85: #
86: # Input to this parser is pre-processed slightly by sed
87: # so this awk parser doesn't have to work so hard. The
88: # changes done by the sed pre-processing step are:
89: # insert a space beween * and pointer name
90: # replace semicolons with spaces
91: #
92: sed_prep='s:\*\([^\*/]\):\* \1:g
93: s/;/ /'
94: awk_parser='
95: # Comment line
96: /^#/ { next; }
97: # First line of description
98: /^vop_/ {
99: name=$1;
100: argc=0;
101: next;
102: }
103: # Last line of description
104: /^}/ {
105: doit();
106: next;
107: }
108: # Middle lines of description
109: {
110: argdir[argc] = $1; i=2;
111: if ($2 == "WILLRELE") {
112: willrele[argc] = 1;
113: i++;
114: } else
115: willrele[argc] = 0;
116: argtype[argc] = $i; i++;
117: while (i < NF) {
118: argtype[argc] = argtype[argc]" "$i;
119: i++;
120: }
121: argname[argc] = $i;
122: argc++;
123: next;
124: }
125: '
126:
127: # This is put after the copyright on each generated file.
128: warning="
129: /*
130: * Warning: This file is generated automatically.
131: * (Modifications made here may easily be lost!)
132: *
133: * Created by the script:
134: * ${SCRIPT_ID}
135: */
136: "
137:
138: # Get rid of ugly spaces
139: space_elim='s:\([^/]\*\) :\1:g'
140:
141: #
142: # Redirect stdout to the H file.
143: #
144: echo "$0: Creating $out_h" 1>&2
145: exec > $out_h
146:
147: # Begin stuff
148: echo "$copyright"
149: echo "$warning"
150: echo '
151: extern struct vnodeop_desc vop_default_desc;
152: '
153:
154: # Body stuff
155: # This awk program needs toupper() so define it if necessary.
156: sed -e "$sed_prep" $src | $awk "$toupper"'
157: function doit() {
158: # Declare arg struct, descriptor.
159: printf("\nstruct %s_args {\n", name);
160: printf("\tstruct vnodeop_desc * a_desc;\n");
161: for (i=0; i<argc; i++) {
162: printf("\t%s a_%s;\n", argtype[i], argname[i]);
163: }
164: printf("};\n");
165: printf("extern struct vnodeop_desc %s_desc;\n", name);
166: # Define inline function.
167: printf("#define %s(", toupper(name));
168: for (i=0; i<argc; i++) {
169: printf("%s", argname[i]);
170: if (i < (argc-1)) printf(", ");
171: }
172: printf(") _%s(", toupper(name));
173: for (i=0; i<argc; i++) {
174: printf("%s", argname[i]);
175: if (i < (argc-1)) printf(", ");
176: }
177: printf(")\n");
178: printf("static __inline int _%s(", toupper(name));
179: for (i=0; i<argc; i++) {
180: printf("%s", argname[i]);
181: if (i < (argc-1)) printf(", ");
182: }
183: printf(")\n");
184: for (i=0; i<argc; i++) {
185: printf("\t%s %s;\n", argtype[i], argname[i]);
186: }
187: printf("{\n\tstruct %s_args a;\n", name);
188: printf("\ta.a_desc = VDESC(%s);\n", name);
189: for (i=0; i<argc; i++) {
190: printf("\ta.a_%s = %s;\n", argname[i], argname[i]);
191: }
192: printf("\treturn (VCALL(%s%s, VOFFSET(%s), &a));\n}\n",
193: argname[0], arg0special, name);
194: }
195: BEGIN {
196: arg0special="";
197: }
198: END {
199: printf("\n/* Special cases: */\n#include <sys/buf.h>\n#include <sys/vm.h>\n");
200: argc=1;
201: argtype[0]="struct buf *";
202: argname[0]="bp";
203: arg0special="->b_vp";
204: name="vop_strategy";
205: doit();
206: name="vop_bwrite";
207: doit();
208: }
209: '"$awk_parser" | sed -e "$space_elim"
210:
211: # End stuff
212: echo '
213: /* End of special cases. */'
214:
215:
216: #
217: # Redirect stdout to the C file.
218: #
219: echo "$0: Creating $out_c" 1>&2
220: exec > $out_c
221:
222: # Begin stuff
223: echo "$copyright"
224: echo "$warning"
225: echo '
226: #include <sys/param.h>
227: #include <sys/mount.h>
228: #include <sys/vm.h>
229: #include <sys/vnode.h>
230:
231: struct vnodeop_desc vop_default_desc = {
232: 0,
233: "default",
234: 0,
235: NULL,
236: VDESC_NO_OFFSET,
237: VDESC_NO_OFFSET,
238: VDESC_NO_OFFSET,
239: VDESC_NO_OFFSET,
240: NULL,
241: };
242: '
243:
244: # Body stuff
245: sed -e "$sed_prep" $src | $awk '
246: function do_offset(typematch) {
247: for (i=0; i<argc; i++) {
248: if (argtype[i] == typematch) {
249: printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n",
250: name, argname[i]);
251: return i;
252: };
253: };
254: print "\tVDESC_NO_OFFSET,";
255: return -1;
256: }
257:
258: function doit() {
259: # Define offsets array
260: printf("\nint %s_vp_offsets[] = {\n", name);
261: for (i=0; i<argc; i++) {
262: if (argtype[i] == "struct vnode *") {
263: printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
264: name, argname[i]);
265: }
266: }
267: print "\tVDESC_NO_OFFSET";
268: print "};";
269: # Define F_desc
270: printf("struct vnodeop_desc %s_desc = {\n", name);
271: # offset
272: printf ("\t0,\n");
273: # printable name
274: printf ("\t\"%s\",\n", name);
275: # flags
276: printf("\t0");
277: vpnum = 0;
278: for (i=0; i<argc; i++) {
279: if (willrele[i]) {
280: if (argdir[i] ~ /OUT/) {
281: printf(" | VDESC_VPP_WILLRELE");
282: } else {
283: printf(" | VDESC_VP%s_WILLRELE", vpnum);
284: };
285: vpnum++;
286: }
287: }
288: print ",";
289: # vp offsets
290: printf ("\t%s_vp_offsets,\n", name);
291: # vpp (if any)
292: do_offset("struct vnode **");
293: # cred (if any)
294: do_offset("struct ucred *");
295: # proc (if any)
296: do_offset("struct proc *");
297: # componentname
298: do_offset("struct componentname *");
299: # transport layer information
300: printf ("\tNULL,\n};\n");
301: }
302: END {
303: printf("\n/* Special cases: */\n");
304: argc=1;
305: argdir[0]="IN";
306: argtype[0]="struct buf *";
307: argname[0]="bp";
308: willrele[0]=0;
309: name="vop_strategy";
310: doit();
311: name="vop_bwrite";
312: doit();
313: }
314: '"$awk_parser" | sed -e "$space_elim"
315:
316: # End stuff
317: echo '
318: /* End of special cases. */'
319:
320: # Add the vfs_op_descs array to the C file.
321: # Begin stuff
322: echo '
323: struct vnodeop_desc *vfs_op_descs[] = {
324: &vop_default_desc, /* MUST BE FIRST */
325: &vop_strategy_desc, /* XXX: SPECIAL CASE */
326: &vop_bwrite_desc, /* XXX: SPECIAL CASE */
327: '
328:
329: # Body stuff
330: sed -e "$sed_prep" $src | $awk '
331: function doit() {
332: printf("\t&%s_desc,\n", name);
333: }
334: '"$awk_parser"
335:
336: # End stuff
337: echo ' NULL
338: };
339: '
340:
341: exit 0
342:
343: # Local Variables:
344: # tab-width: 4
345: # End:
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